A stab in the dark here, but are you sure that Explorer is recognizing the new version as the one to open with by default? Otherwise, I have no ideas, and hope someone with more technical expertise will respond. I mention this because the Finder occasionally doesn't agree with me about which version of PS to use when opening a file.

I've never had it fail dragging a photo into the blank area (or onto the dock icon), though. I take it you can't drag it from Explorer into the empty area and have it actually open? Or from Bridge, either?

I cant open any photo even by dragging into the empty area, as you can see in the video i showed.I didnt try bridge, because i never used it.I tried to assign default program for photos as Photoshop, and still didnt work.

I'm so sorry. I've never heard anyone say they can open the program, menus respond, but no images will actually open. On a Mac, the Finder takes the last-installed version of Photoshop, not the latest version, as its default, and it can happen that it won't then open images in the version you want. That's what makes me wonder if something didn't break between Windows and Photoshop file associations, but if it did, I wouldn't have a clue what that was.

I expect someone with the technical knowledge to make a fair guess will step in soon. They usually do.

"could you please verify that you have write/read access to the UIPrefs.psp (located under C:\Users\[username]\AppData\Roaming\Adobe\Adobe Photoshop CC 2017\Adobe Photoshop CC 2017 Settings\)?"

I'm reading a long thread with people having variations on the inability to open files in PS over the past couple years. Some are connecting the issue to their video card drivers and updating those might work, if they're not already up to day, but the above permissions issue where you permit all read/write users access to the prefs folder did come up with AE for me a while back. I had Admin privileges, but not all users. That's at least something easy to try.

However, I'll say that for me, it manifested itself immediately, not after opening and then trying to open a document. AE let me know in no uncertain terms that I wasn't going to be able to use the program.

Another solution given was to uninstall/reinstall the printer driver. Don't ask me why that worked.<G>

Another solution for Windows users—Control+Break/Pause. A lot of users said that worked for them.

Here's another one: "Logitech Keyboard! This is the answer for me!When i dont use that keyboard (Logitech K360), Photoshop is working normally.

So for various people, something is coming between the system and Photoshop, and this is as muchas I've so far been able to find on the subject. Sorry I haven't seen a white paper from Adobe or anything like that with a real solution—but some more things to try.

I'm relieved something worked. I found it disturbing to see so many threads and "solutions" over the years. They all seemed to involve the OS and the hardware, and more common than I knew. Even when I was on a PC, I didn't have that happen, but on a Mac, it's less likely to because our hardware options are so limited—a double-edged sword, that.